lecture22 - Thermal power plant components II Turbines...

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ENGRI 1290 1 Thermal power plant components II Turbines Thermodynamic properties of water Component sizing Power plant operation
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ENGRI 1290 2 Turbine operation
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ENGRI 1290 3 Turbine disassembly
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ENGRI 1290 4 Water tables •v – Specific volume –m 3 /kg – This is just the inverse of the mass density (v=1/ ) •u – Specific internal energy –k J / k g •h – Specific enthalpy J / k g Water tables give the properties of water for different pressures and temperatures. In particular you will find
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ENGRI 1290 5 How to use water tables • Find the phase the water is in – Liquid: use saturated vapor table – Phase change: use saturated vapor table – Gas: use superheated steam table • Find enthalpy using the values given for p and T –L iqu id : u se h f (or v f ) found at T – Phase change: use h fg =h f -h g at p and T – Gas: use h g (or v g ) found at p and T
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ENGRI 1290 6 Temperature table for saturated water
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ENGRI 1290 7 Pressure table for saturated water
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ENGRI 1290 8 Tables for super heated (dry) steam Try to find the density and specific enthalpy for steam at: 1-3MPa and 400ºC 2-150kPa and 200ºC
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lecture22 - Thermal power plant components II Turbines...

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